Bluesky MISC TBM-FR250SDG Rear Suspension Enhancement System Helper Springs Kit

The Bluesky MISC TBM-FR250SDG is a rear suspension enhancement system designed as a direct replacement for the Timbren FR250SDG. This bolt-on kit upgrades the factory bump stops with progressive-rate hollow rubber helper springs, delivering significantly improved load-handling, reduced rear sag, and enhanced stability when towing or hauling heavy cargo.

How It Works:

The kit installs between the truck chassis and the rear axle, replacing the OEM jounce stops. When the vehicle is unloaded, the springs maintain a small clearance gap so ride quality stays close to stock. As load is applied, the progressive rubber springs automatically engage to resist squat, absorb road shocks, and keep the vehicle level — no manual adjustments required.

Key Features:

• 8,600 lb. rated load support capacity (per pair) for demanding towing and hauling applications
• Progressive-rate hollow rubber springs automatically adjust to load conditions for a smooth, controlled ride whether loaded or empty
• Eliminates rear suspension sag and bottoming out when towing heavy trailers or carrying maximum payload
• Reduces body roll, sway, and bounce for improved handling stability and safer towing
• No airlines, compressors, or fittings required — completely maintenance-free design
• Bolt-on installation with no drilling required; includes all necessary mounting brackets and hardware
• Laser-cut, precision-bent steel brackets with powder-coat finish for corrosion resistance
• Lifetime warranty coverage
• Replaces OEM part number / cross-reference: Timbren FR250SDG

Kit Includes:

• 2x Hollow rubber helper springs
• 2x Steel mounting brackets
• All necessary installation hardware

Designed for stock-height vehicles only (0" of rear lift). This system improves ride quality and load management without altering the vehicle's Gross Vehicle Weight Rating (GVWR) — always observe manufacturer weight limits.